body{
  margin: 0;
  overflow-x: hidden;
}
.l-drawer.mask{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  background-color: rgba(0, 0, 0, .55);
}
.l-drawer-box{
  width: 575px;
  height: 100%;
  position: absolute;
  top: 0;
  right: 0;
  background-color: #ffffff;
  z-index: 999;
}
.open{
  width: 80px;
  height: 44px;
  border: 1px solid #c5c6c5;
  background-color: #2a86db;
  color: #ffffff;
  font-size: 12px;
  margin: 20px;
  border-radius: 5px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  -ms-border-radius: 5px;
  -o-border-radius: 5px;
}